Boss Glass Door Oven (1909)

We now take it for granted that we can see what's cooking, but the first ovens offered no view of what was going on behind the door. Introduced to the market in 1909, the Boss Glass Door Oven was touted as a great advancement that would guarantee perfect cakes and properly done roasts, because you could watch every minute of their progress. This was certainly an innovation, but as most cooks have better things to do in the kitchen than standing around watching the turkey cook, maybe a built-in timer would have been a good idea too?